2216859840 has 784 divisors, whose sum is σ = 9234818208. Its totient is φ = 501645312.

The previous prime is 2216859809. The next prime is 2216859863. The reversal of 2216859840 is 489586122.

2216859840 is a `hidden beast` number, since 2 + 2 + 16 + 8 + 598 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 51554859 + ... + 51554901.

Almost surely, 2^2216859840 is an apocalyptic number.

2216859840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2216859840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4617409104).

2216859840 is an abundant number, since it is smaller than the sum of its proper divisors (7017958368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2216859840 is a wasteful number, since it uses less digits than its factorization.

2216859840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 2216859840 is about 47083.5410732880. The cubic root of 2216859840 is about 1303.9053841295.

The spelling of 2216859840 in words is "two billion, two hundred sixteen million, eight hundred fifty-nine thousand, eight hundred forty".